

Right, but people use space heaters all the time inside their homes. This is even less dangerous because people tend not to park their cars on carpet.
If we’re worried about pulling 12A out of a 15A outlet, there is much more to be worried about before we get to cars.
As TC has covered this before, consumers are clueless (and cheap) about extension cords.
Only a danger if the cord is tightly coiled and drops enough voltage to get warm, but not enough to trip the car’s protection circuit. A lot has to go wrong for this to be a major problem.
Also all extension cords are wrapped in fire retardant plastic, so it’d likely melt, short out, blow the breaker, and nothing would happen.
Electrical code is wrapped in many layers of safety. You really have to try to hurt yourself.











The photo you linked was a dedicated circuit installed by a licensed electrician. Mistakes/freak accidents happen. As I said in another comment, think of how many millions of households use 1440W space heaters indoors and don’t burn down. That’s what TC is advocating here. By and large, it’s completely safe.